Internal combustion engine



NOV- 11, 1941 A. l. ADDISON E-rAL 2,252,264

INTERNAL COMIBUSTION ENGINE Filed July 10, 1959 2 Sheets-Sheet 1 I N VEN T0195.

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/T TOR/VEX A. l. ADDISON ETAL 2,262,264

INTERNAL COMBUSTION ENGINE Filed July 10, 1959 Nov. 11, 1941.

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' Patented Nev. 11,1941 y UNITED STATE s PATENT I OFFICErivrEaNsLcoMnUsrIoN ENGINE A'mol I. Addison, Long Beach, Howard B.

Cheshire Long Beach, Calif.

, Wilmington,

and Leroy E. Caveriy,

Application July 10, 1939, Serial No. 283,606 Claims. (CL 12351) posedpistons in air cylinders arranged immediately adjacent the powercylinder.

" Another object of our invention is to provide a novel and e'ectivemeans of reciprocating the opposed pistons in the air cylinders from thepivotally mounted arms, said arms being actuated by the power pistons.

Still another object of our invention is to provide a novel 'scavengingmeans for each power cylinder, consisting of pairs o1' air cylinders,each pair o! cylinders having a common compression chamber.

A feature of our invention resides in the novell means whereby thevolume of the air compression chamber may be easily and effectivelyaltered to change-the pressure of the compressed air to suit variousoperating conditions of the engine. l

Other objects, advantages and features of invention may appear from theaccompanying drawings, the subjoined detailed description, and

the appended claims.

In the drawings:

gine.

Figure 2 is a sectional view taken on line 2-2 o! Figure 1.

Referring more particularly tothe drawings,

. Figure 1 is a vertical,I sectional view o! our enour engine comprisesa `frame I, in which a crank shaft 2 is journaled. The crank shaft isprovided with a separate throw for each piston in the engine, and wehave here disclosed a single cylinder with two pistons and, therefore,the crank shaft is'provided with two throws. A cylinder 3 is iixedlymounted in the Vupper part of the frame I`, and is arrangedsubstantially as shown. A pair of pistons l, i are mounted in thecylinder 3 and these pistons move simultaneously in the cylinder-thatis, they are of the usual opposed A pair oi rocker arms S, l arepivotaily journaledinthe frame I, theupper ends of the armsbeingconnectedtothepistonslandibymeans ot the connecting rods 3, 3respectively. The iowerendsoitherockerarmsand'l areconnected to thethrows of the crankshaft 2 through the pitmans III and II, respectively.The cylinder 3 may be e. separate part or it may` be integrally castwith the frame I or the cylinder assembly. We have here shown thecylinder 3 as separate from the water jacket I2.

Our engine is here shown as the Diesel type.

Howeven an ignition type of engine may also be used and includesubstantially the same construction. For the Diesel type. the usualinjection nozzle I3 extends into the cylinder 3 between the pistons land 5. The usual pressure pump Il compresses the fuel for the purpose ofinjecting this fuel into the cylinder on the compression stroke, all ofwhich is usual and weilknown. For the purpose of scavenging the cylinder3, we -provide an opposed piston air compressor adjacent the cylinder 3.In placing the compressor close to the cylinder with consequent shortcircuits, a greater eiliciency is obtained ldueto the fact that the heatof compression oi the air is conserved. Furthermore. in so positioningthe compressor, the drive for the pistons is very effective, and alsosimple and compact, as will` be subsequently described.

The compresser I5 consists of a pair of cylinders I6 and I1. Thesecylinders may be integrally cast with the water jacket I2, or may beseparate and attached thereto, and are arranged immediately adjacent thecylinder 3. The cylinders I6 and I1 are in the same vertical plane asthe rocker arms i and 1, and are inclined at an angle, as shown inFigure 1. The'pistons I8 and I9 are mounted in the cylinders Il and I1respectively, and these pistons are reciprocated through links 20 and2I`, which are pivotally attached to said pistons and to the rocker arms6 and 1, as shown in Figure 1. The links 20 and 2I are connected to' thearms 6 and 1 below the pivot point oi said arms, thereby causing thepistons I8 and I9 to move upwardly on the compression stroke, as thepistons 4 and 5 are moving outwardly on the power stroke. The cylindersI6 and I1 are provided with a common oompression chamber 22, which isimmediately adjacent the cylinder 3, and the dividing wall oi' thiscompression chamber may consist of a part of the wall oi the waterjacket I2. scavenging ports 23 and 24 extend from the compression underpressure into the cylinder 3, thus clearing this' cylinder of the burntgases. Within the compression chamber 22 there is an unobstructed spacearound the mouth portions ci the ports 2l and 2l, allowing thecompression-heated air to pass directly through them without reductionin temperature. l

If it is the desire to raise the compression in the compresser, blocks25 can be placed in the compression chamber 22, and these blocks areheld in position by the bolt 26. The blocks reduce the volumetriccapacity of the compression chamber and thus the compression isincreased.l

is preferably of the type having a fabric or me' tallic nlter pad,lwhich is usual and well-known.

Having described our invention, we claim:

1. Incombination with an engine, including a frame, a-cylinder, a pairof opposed pistonsin the cylinder. a pair of rocker arms journaled inthe frame. and drive means extending from the pistons to the rockerarms, of lan opposed piston air compresser arranged immediately adiacentthe power cylinder. said compresser comprising a pair of cylinders, apiston in each cylinder, and a driving link extending from each pistonto a rocken arm, whereby said pistonsl are recipro cated, said aircompresser having a compression chamber common to both o! saidcylinders, and compression pressure adjusting blocks removably mountedin the compression chamber'.

2. In combination with an engine, including a frame, a horizontal powercylinder, a pair of opposed pistons in the cylinder, a pair of rockerarms iournaled in the frame, and drive means extending from' the pistonstothe rocker' arms. ofan opposed piston air compresser arrangedimmediately adjacent the power cylinder, said rectly through said waterjacket into the power cylinder, and a driving link connecting each ofthe. 4pisirins in the air compresser to a rocker arm, whereby thepistons in the compresser are reciprocated.

3. In. combination with an engine, includinga frame. a horizontal powercylinder, a pair of opposed pistons in the cylinder, a pair of rockervarms icurnaied in the frame, and drive means extending from the pistonsto the rocker arms, of an opposed piston air compresser arrangedimmediately adjacent the power cylinder, said compresser beingintegrally formed with the water jacket of the power cylinder, said com-rocker arm, whereby the pistons in the compresser are reciprocated, andcompression pressure adjusting blocks removably mounted in thecompression chamber.

4. In an-engine, a frame, a power cylinder mounted on said frame, a pairor opposed plstons in said cylinder, an opposed'piston air compressorhaving a compression chamber in controlled communication with thecylinders oi* said opposed pistons, said compression chamber havingladjusting blocks therein to vary its capacity, and air compression meansoperated by the engine to produce in said air compression chamber theair pressures required :or scavenging and ignition purposes.

5. In an engine. a frame. a power cylindermounted on said frame, a pairo! opposed piaf tons in said cylinder, an opposed piston air com'-pressor having a compression chamber in controlledl communication withcylinders of said opposed pistons, said compression chamber havinaadjusting blocks therein to vary its capacity,

compresser i being integrally formed with the power cylinder, a pistonin each cylinder, a com pression chamber common to both cylinders, a

' portion o! the'wall o! said compression chamber l being formed by saidwater Jacket said air com'- presser having a pair of scavenging DOrtsextending from the common compression chamber diand air compressionmeans operated by the eiigine to produce in said air compression chamberthe air pressures required :or scavenging and ignition purposes. there acompression block in` each of opposite end portions oi said chamber, anda threaded bolt connecting said blocks for adjustingV them toward andaway from eachother. t AMOS I. ADDISON.

HOWARDB. CHESHIRE. LEROY E. CAVERLY.

